SN74LVC1T45DBVR Detailed explanation of pin function specifications and circuit principle instructions
The part "SN74LVC1T45DBVR" belongs to Texas Instruments (TI). It is a logic-level converter or voltage-level translator. This specific device is typically used for translating voltage levels between two different logic systems, such as between 5V and 3.3V, which is common in many mixed-voltage systems.
Overview:
Brand: Texas Instruments
Device Type: Voltage-level translator (Logic-level converter)
Package Type: DBVR (SOT-23-6)
The SN74LVC1T45DBVR is a single-bit bidirectional voltage-level translator. It has 6 pins in total, and each pin has a specific function. Let’s break down its pin function and specifications in detail.
Pin Function Table (SOT-23-6 Package):
Pin Number
Pin Name
Pin Function Description
1
A1
Input pin for the low-voltage side (LV). Used for receiving data from a lower voltage system.
2
B1
Output pin for the high-voltage side (HV). Sends the translated data to a higher voltage system.
3
A2
Input pin for the low-voltage side (LV). Used for receiving data from a lower voltage system.
4
GND
Ground pin. Common reference for both voltage systems.
5
B2
Output pin for the high-voltage side (HV). Sends the translated data to a higher voltage system.
6
VCC
Supply voltage pin for the high-voltage side (HV). Typically 5V or 3.3V depending on the system.
Detailed Pin Functions:
Pin 1 (A1): This is the first input pin that connects to the low-voltage side of the system. It accepts the logic signal from a lower voltage system, typically operating at 3.3V or below.
Pin 2 (B1): This is the corresponding output pin that outputs the translated voltage signal. After the voltage translation is complete, it sends the signal to a higher-voltage system, typically operating at 5V or higher.
Pin 3 (A2): This is another input pin that connects to the low-voltage side of the system. It accepts a logic signal from a different low-voltage component.
Pin 4 (GND): This is the ground pin. Both the low and high-voltage systems share the common ground, allowing the proper voltage translation.
Pin 5 (B2): This is the corresponding output pin for the second input (A2). After translating the voltage, this pin outputs the translated signal to the higher-voltage system.
Pin 6 (VCC): This is the supply voltage pin for the high-voltage side (HV). The VCC pin connects to the
Power supply of the high-voltage system, typically providing 5V or 3.3V.
Circuit Principle:
The SN74LVC1T45DBVR works by translating voltage levels from one system to another. It is particularly useful when you have two different logic systems that need to communicate, but they operate at different voltage levels. The device allows bidirectional communication, meaning data can flow in either direction, and it automatically adjusts the voltage levels as needed.
When a signal is received at an input pin (A1 or A2), it is processed by the internal circuitry of the device. The signal is then sent to the corresponding output pin (B1 or B2) at the appropriate voltage level, ensuring compatibility between different logic systems. The device is capable of handling signals at both 3.3V and 5V logic levels, which makes it versatile for a wide range of applications.
FAQ (Frequently Asked Questions):
What is the purpose of the SN74LVC1T45DBVR?
The SN74LVC1T45DBVR is a bidirectional voltage-level translator used to convert signals between different voltage logic levels (e.g., 3.3V to 5V or vice versa).
How many pins does the SN74LVC1T45DBVR have?
The SN74LVC1T45DBVR has 6 pins in total.
Can the SN74LVC1T45DBVR translate signals both ways?
Yes, it is a bidirectional translator, meaning it can translate signals in both directions.
What voltage levels does the SN74LVC1T45DBVR support?
The device supports low-voltage logic levels (typically 3.3V) and high-voltage logic levels (typically 5V).
How does the SN74LVC1T45DBVR handle power supply?
The device uses a ground (GND) pin and a high-voltage supply (VCC) pin. VCC is typically 5V or 3.3V, depending on the system.
Is the SN74LVC1T45DBVR compatible with 5V systems?
Yes, the device can
interface between 3.3V and 5V systems, making it suitable for applications with mixed-voltage logic.
What is the pin configuration for the SN74LVC1T45DBVR?
The pin configuration is as follows: A1 (Input), B1 (Output), A2 (Input), GND (Ground), B2 (Output), VCC (Supply Voltage).
Can I use the SN74LVC1T45DBVR to interface with 1.8V systems?
The device is primarily designed for 3.3V and 5V systems, so interfacing with 1.8V systems may not be ideal without additional considerations.
Is the SN74LVC1T45DBVR suitable for high-speed applications?
Yes, the device supports fast data transmission, making it suitable for high-speed logic-level translation.
What is the recommended operating temperature range for the SN74LVC1T45DBVR?
The device operates in the range of -40°C to 125°C, making it suitable for a wide range of environments.
Can the SN74LVC1T45DBVR handle both digital and analog signals?
No, the device is designed specifically for digital signals and logic-level translation.
Does the SN74LVC1T45DBVR require any external components for operation?
No, the device is a self-contained voltage translator and does not require external components for basic operation.
What is the maximum data rate the SN74LVC1T45DBVR can handle?
The device can handle data rates up to 100 MHz in typical applications.
Is the SN74LVC1T45DBVR affected by ESD?
Yes, like most semiconductor devices, it is sensitive to electrostatic discharge (ESD) and should be handled with appropriate precautions.
Can the SN74LVC1T45DBVR be used in battery-powered systems?
Yes, as long as the voltage levels are within the supported ranges, it can be used in battery-powered systems.
Does the SN74LVC1T45DBVR have any built-in protection?
The device has limited built-in ESD protection, but external protection may be needed for sensitive applications.
How is the SN74LVC1T45DBVR different from other level translators?
The SN74LVC1T45DBVR is unique for its bidirectional capability, supporting both 3.3V and 5V systems in a single device.
What is the maximum current the SN74LVC1T45DBVR can handle?
The device can handle a maximum current of 24 mA per pin.
Can the SN74LVC1T45DBVR be used in automotive applications?
Yes, it can be used in automotive applications as long as the voltage and environmental conditions are met.
How do I calculate the power consumption of the SN74LVC1T45DBVR?
Power consumption depends on the operating voltage and current draw, typically in the range of milliwatts for low-power logic devices.